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project1.py
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project1.py
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import sqlite3
import sys
from datetime import datetime
from threading import Timer,Thread,Event
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QWidget, QApplication, QPushButton, QLineEdit, QLabel, QCheckBox, QPlainTextEdit, QFileDialog, QHBoxLayout, QVBoxLayout, QErrorMessage, QStackedLayout, QFrame, QScrollArea, QGridLayout
class perpetualTimer(): # Класс для таймера, он нам пригодится
def __init__(self,t,hFunction):
self.t=t
self.hFunction = hFunction
self.thread = Timer(self.t,self.handle_function)
def handle_function(self):
self.hFunction()
self.thread = Timer(self.t,self.handle_function)
self.thread.start()
def start(self):
self.thread.start()
def cancel(self):
self.thread.cancel()
class Orders(QWidget):
def __init__(self):
super().__init__()
self.initUI()
def closeEvent(self, event):
if self.Timer:
self.Timer.cancel()
event.accept()
def initUI(self):
self.setGeometry(200, 150, 500, 500)
self.setWindowTitle('Заказ в Ресторане')
self.IsMenuLoaded = False
self.DescriptionLabel = QPlainTextEdit(' Программа оформления заказов в ресторане\n\n\n Проект для Яндекс.Лицея по теме PyQt5\n\n\n Холяна Тимофея')
self.DescriptionLabel.setReadOnly(True)
self.Help1 = QLabel('Укажите путь до базы данных')
self.PathToDB = QLineEdit()
self.OpenDBFile = QPushButton('...')
self.OpenDBFile.clicked.connect(self.on_select_file)
self.StartBtn = QPushButton('Старт')
self.StartBtn.clicked.connect(self.on_start)
self.OpenFileLayout = QHBoxLayout()
self.OpenFileLayout.addWidget(self.PathToDB)
self.OpenFileLayout.addWidget(self.OpenDBFile)
self.FirstScreen = QVBoxLayout()
self.FirstScreen.addWidget(self.DescriptionLabel, alignment=Qt.AlignCenter)
self.FirstScreen.addWidget(self.Help1, alignment=Qt.AlignCenter)
self.FirstScreen.addLayout(self.OpenFileLayout)
self.FirstScreen.addWidget(self.StartBtn, alignment=Qt.AlignCenter)
self.FirstScreen.addStretch(1) # Стартовый экран
self.DateTime = QLineEdit()
self.DateTime.setReadOnly(True) # Показываем время
self.ordernum = QLineEdit()
self.ordernum.setReadOnly(True) # Номер заказа
self.Header1 = QHBoxLayout()
self.Header1.addWidget(self.DateTime, alignment=Qt.AlignLeft | Qt.AlignTop)
self.Header1.addWidget(self.ordernum, alignment=Qt.AlignRight | Qt.AlignTop) # Эти два виджета центтрируем по верхним углам
self.SaveOrderBtn = QPushButton('Оформить заказ')
self.SaveOrderBtn.clicked.connect(self.get_receipt)
self.StatsBtn = QPushButton('Отчёт')
self.StatsBtn.clicked.connect(self.get_stats)
self.MenuLayout = QGridLayout() # будем распологать элементы сеткой
self.MenuForm = QWidget()
self.MenuForm.setLayout(self.MenuLayout)
self.Menu1 = QScrollArea()
self.Menu1.setWidget(self.MenuForm)
self.Menu1.setWidgetResizable(True) # Добавим возможность перемотки
self.Footer1 = QHBoxLayout()
self.Footer1.addWidget(self.SaveOrderBtn, alignment=Qt.AlignCenter | Qt.AlignBottom)
self.Footer1.addWidget(self.StatsBtn, alignment=Qt.AlignCenter | Qt.AlignBottom)
self.Help2 = QLabel('Сумма заказа: ')
self.TotalMoney = QLineEdit()
self.TotalMoney.setReadOnly(True)
self.TotalMoney.setFixedWidth(200)
self.Footer2 = QHBoxLayout()
self.Footer2.addWidget(self.Help2, alignment=Qt.AlignLeft | Qt.AlignCenter)
self.Footer2.addWidget(self.TotalMoney, alignment=Qt.AlignLeft | Qt.AlignBottom)
self.Footer2.addStretch(1)
self.MainScreen = QVBoxLayout()
self.MainScreen.addLayout(self.Header1)
self.MainScreen.addWidget(self.Menu1, stretch=1)
self.MainScreen.addLayout(self.Footer2)
self.MainScreen.addLayout(self.Footer1) # Добавляем на основной экран нужные виджеты
self.Notification = QLabel('Заказ прошёл успешно')
self.Receipt = QPlainTextEdit()
self.Receipt.setReadOnly(True)
self.Back1 = QPushButton('Назад')
self.Back1.clicked.connect(self.start_main)
self.OrderScreen = QVBoxLayout()
self.OrderScreen.addWidget(self.Notification, alignment=Qt.AlignCenter|Qt.AlignTop)
self.OrderScreen.addWidget(self.Receipt, stretch=1)
self.OrderScreen.addWidget(self.Back1, alignment=Qt.AlignCenter|Qt.AlignBottom) # Создали экран с чеком
self.Stats = QPlainTextEdit()
self.Stats.setReadOnly(True)
self.Back2 = QPushButton('Назад')
self.Back2.clicked.connect(self.back_to_main)
self.StatsScreen = QVBoxLayout()
self.StatsScreen.addWidget(self.Stats, stretch=1)
self.StatsScreen.addWidget(self.Back2, alignment=Qt.AlignCenter|Qt.AlignBottom) # Создали экран со статистикой
self.StLayout = QStackedLayout() # Виджет для отображения нескольких экранов в одном окне
self.Frame1 = QFrame(self)
self.Frame1.setLayout(self.FirstScreen) # Собственно первый экран
self.StLayout.addWidget(self.Frame1)
self.setLayout(self.StLayout)
def on_select_file(self):
FileName, _ = QFileDialog.getOpenFileName(self, 'Открыть базу данных', None, '*.db')
if FileName:
self.PathToDB.setText(FileName) # Чтобы выбрать и подключить базу данных
def get_filename(self):
return self.PathToDB.text()
def on_start(self):
FileName = self.get_filename()
if FileName:
try:
con = sqlite3.connect(FileName)
cur = con.cursor()
self.meals = cur.execute("""SELECT id, name, price FROM meals""").fetchall()
if len(self.meals) == 0:
msg = QErrorMessage(self)
msg.showMessage('В базе данных нет продуктов')
con.close()
self.start_main()
except Exception as e:
msg = QErrorMessage(self)
msg.showMessage('Неверный путь до базы данных. ' + str(e))
else:
msg = QErrorMessage(self)
msg.showMessage('Не указан путь до базы данных') # Отображение основного экрана или увеномление об ошибке
def GetMaxOrdersNum(self):
con = sqlite3.connect(self.get_filename())
cur = con.cursor()
maxId = cur.execute("""SELECT MAX(id) FROM orders""").fetchone()
con.close()
if maxId[0] is None:
return 0
return maxId[0] # Нужная функция
def SaveOrder(self):
con = sqlite3.connect(self.get_filename())
cur = con.cursor()
cur.execute("""INSERT INTO orders (date) VALUES (date('now'))""")
self.OrderId = cur.lastrowid
for i in self.choices:
if i.isChecked() and int(self.numbers[self.choices.index(i)].text()) != 0:
cur.execute("""INSERT INTO ordered (id_order,id_meal,count) VALUES (?,?,?)""",
(self.OrderId,self.mealsid[self.choices.index(i)],int(self.numbers[self.choices.index(i)].text())))
con.commit()
con.close() # Сохраняем заказ в базу данных
def getStatsDaily(self):
con = sqlite3.connect(self.get_filename())
cur = con.cursor()
result = cur.execute("""SELECT id_meal, count FROM ordered
WHERE(id_order in (SELECT id FROM orders WHERE date=date('now')))""").fetchall()
con.close()
g = []
for i in self.mealsid:
s = 0
for j in result:
if j[0] == i:
s += j[1]
if s != 0:
g.append((i, s))
return g
def getTotalSell(self):
con = sqlite3.connect(self.get_filename())
cur = con.cursor()
result = cur.execute("""SELECT id_meal, count FROM ordered
WHERE(id_order in (SELECT id FROM orders WHERE date=date('now')))""").fetchall()
con.close()
s = 0.0
for i in result:
ind = self.mealsid.index(i[0])
s += self.prices[ind] * i[1]
return s # методы, подщитывающие данные для отчёта
def updateTime(self):
now = datetime.now()
self.DateTime.setText(now.strftime("%d.%m.%Y %H:%M:%S")) # Показать время
def start_main(self):
self.ordernum.setText('Заказ №' + str(self.GetMaxOrdersNum() + 1))
self.TotalMoney.setText('0.0 рублей')
if not self.IsMenuLoaded:
self.timer = perpetualTimer(1,self.updateTime)
self.timer.start()
self.updateTime()
self.mealsid = []
self.prices = []
self.choices = []
self.money = []
self.counting = []
self.numbers = []
for i, row in enumerate(self.meals):
self.mealsid.append(row[0])
self.prices.append(row[2])
qc = QCheckBox(row[1])
qc.clicked.connect(self.updateTotalMoney)
self.choices.append(qc)
self.MenuLayout.addWidget(qc, i, 1)
qm = QLabel(str(self.prices[i]) + ' р.')
self.MenuLayout.addWidget(qm, i, 2)
btn, btn2 = QPushButton('-'), QPushButton('+')
self.MenuLayout.addWidget(btn, i, 3)
self.MenuLayout.addWidget(btn2, i, 4)
btn.setFixedWidth(40)
btn2.setFixedWidth(40)
btn.clicked.connect(self.less)
btn2.clicked.connect(self.more)
self.counting.append(btn)
self.counting.append(btn2)
qn = QLabel('0')
self.numbers.append(qn)
self.MenuLayout.addWidget(qn, i, 5)
self.MenuLayout.setColumnStretch(5,1)
self.MenuLayout.setRowStretch(len(self.meals),1)
self.Frame2 = QFrame(self)
self.Frame2.setLayout(self.MainScreen)
self.StLayout.addWidget(self.Frame2)
self.Frame3 = QFrame(self)
self.Frame3.setLayout(self.OrderScreen)
self.StLayout.addWidget(self.Frame3)
self.Frame4 = QFrame(self)
self.Frame4.setLayout(self.StatsScreen)
self.StLayout.addWidget(self.Frame4)
self.IsMenuLoaded = True
else:
# обнулить все значения
for i in self.numbers:
i.setText('0')
for i in self.choices:
i.setChecked(False)
self.StLayout.setCurrentIndex(1) # Будем загружать основной экран и чистить его когда надо
def back_to_main(self):
self.StLayout.setCurrentIndex(1) # К кнопке 'назад'
def get_receipt(self):
self.start_receipt()
def start_receipt(self):
try:
if sum([int(self.numbers[self.choices.index(i)].text()) for i in self.choices if i.isChecked()]) == 0:
msg = QErrorMessage(self)
msg.showMessage('Не выбрано ни одного блюда.')
return
self.SaveOrder()
self.Receipt.setPlainText(self.PrintReciept())
self.StLayout.setCurrentIndex(2)
except Exception as e:
msg = QErrorMessage(self)
msg.showMessage('Ошибка: ' + str(e)) # Загружаем чек при соблюдённых условиях
def PrintReciept(self):
ordered = [i.text() + ' (*' + self.numbers[self.choices.index(i)].text() + ')' + ' - ' + str(int(self.numbers[self.choices.index(i)].text()) * self.prices[self.choices.index(i)]) + ' рублей' for i in self.choices if i.isChecked() and self.numbers[self.choices.index(i)].text() != '0']
strReciept = ''
strReciept= strReciept + '------------------------------------------' + '\n'
now = datetime.now()
strReciept= strReciept + 'Заказ №' + str(self.OrderId) + ' ' + now.strftime("%d.%m.%Y %H:%M:%S")
strReciept= strReciept + '\n' + '------------------------------------------' + '\n'
strReciept= strReciept + str('\n'.join(ordered))
strReciept= strReciept + '\n' + '------------------------------------------' + '\n'
strReciept= strReciept + 'Всего - ' + str(self.calculateTotal()) + ' рублей'
strReciept= strReciept + '\n' + '------------------------------------------' + '\n'
return strReciept # Печатаем чек
def get_stats(self):
self.start_stats()
def start_stats(self):
try:
self.Stats.setPlainText(self.PrintStats())
self.StLayout.setCurrentIndex(3)
except Exception as e:
msg = QErrorMessage(self)
msg.showMessage('Ошибка: ' + str(e)) # Также как с чеком, формулируем отчёт
def PrintStats(self):
StatsDaily = self.getStatsDaily()
TotalSell = self.getTotalSell()
now = datetime.now()
strStats = ''
strStats += 'Отчёт за ' + now.strftime("%d.%m.%Y")
strStats += '\n\nПродано за день:\n'
for i in StatsDaily:
mealnum = self.mealsid.index(i[0])
strStats += '- ' + self.choices[mealnum].text() + ': ' + str(i[1]) + ' шт.\n'
strStats += 'Всего продано товаров на сумму ' + str(TotalSell) + ' рублей.'
return strStats # И печатаем его
def less(self):
number = self.numbers[self.counting.index(self.sender()) // 2]
if number.text() != '0':
number.setText(str(int(number.text()) - 1))
self.updateTotalMoney()
def more(self):
number = self.numbers[self.counting.index(self.sender()) // 2]
number.setText(str(int(number.text()) + 1))
self.updateTotalMoney() # Для работы кнопок, формирующих количество одинаковых блюд в заказе
def updateTotalMoney(self):
self.TotalMoney.setText(str(self.calculateTotal()) + ' рублей')
def calculateTotal(self):
return float(sum([float(self.numbers[self.choices.index(i)].text()) * self.prices[self.choices.index(i)] for i in self.choices if i.isChecked()]))
# Ну и чтобы отображалась текущая сумма заказа
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Orders()
ex.show()
sys.exit(app.exec())